Ice-making and refrigerating machine.



, W. GRAAFF. ICE MAKING AND BEFBIGEBATING MACHINE.

A'PPLIUATION FILED 512m. 26, 1911.

1,097,312. Patented May 19, 1914.

Fz' in asses.-

wxnnnnu enenrr, or BERLIN, GERMANY.

-: mg and refrigerating machines.

Specification of Letters ratent.

' ICE-MAKING Ann nnrmenmrme MACHINE.

To all whom it ma concern:

Be it known t at L'wmrmmz Gnm'r, merchant, a subject of the German Emperor, and resid' at 17 Linkstra'sse, Berlin, W. 9, in the ingdom of Prussia, Germany,

- have invented certain new and useful Improvements in Ice-Makin and Refrigeratmg Machines, of which t e following is' a "specification.

The present invention relates to ice-mak- The refrigerator comprlses a condenserev'aporator in a container; which holdsfreez-f ing cells, an ice-safeilone or several refrlgw crating boxesor the kc and is filled with a medium such as a non-freezing brine adapted'to transmit the cold' fromthe 'condenser evaporator to the freezingcells, the ice-safe or the like. Into this cold transmitting medium the-condenser-evaporator of theicemaking machine may be-completely sub-.

' emerged. It'is, however, more convenient and advantageous, especially with revolving machines to partly immerge the. condenserevaporator intothe' cold-transmitting medium, so that in conse uence of its rotation it will both agitate t is liquid and also a carry with it in an upward direction a part of the medium taken from the upper, warmer portions, andv that the raised part ofthe medium will spread over the surface of the condenser-evaporator whereby itstemperature will -be greatly reduced. On

again reaching the remaining, warmer'pol" tion of the non-freezingmedium, this cooler portion-will thereupon sink down to the bot-.

tom and force the warmer'portion upward. This warmer portion. 1s m'due course catried around b the" revolvin condenserevaporator .an cooled. By t is means a regular circulation of the cold-transmitting medium or brinejis produced, which J wil greatly promote the ice-making and re frig-- cratingprocess. For facilitating the ra sing.

of the-warmer portionsof the cold-transmitting medium by the condenser-evaporator,

the latter maybe provided with webs, buck ets or the like. r. a In the accompanying drawing a constructional form of the present invention is exem' lified. igurel -is' a plan of the arrangement partly in section, the'cover being removed;

Fi 1, with the cover inlace. fn this drawing a is t e condenser-evapo- I 1 Application and September 26,1911. Serial in. 651,393.

number an are hown in the shape of flat boxes, so as to 2isa section along the line A--B in Patented May 19, 1914.

rator of an ice-makingmachine, which condenser-evaporator for the purpose of promoting the process within and without, coni sists of a number. of hollow lenticular eleso j ments in communication with eachv other forming a closed vessel which at one end communicates with a cylindrical boiler or generator-absorber n, and with.. which it is made to rotate around a commonaxis. The condenser-evaporator 0: 1s inclosed in a struc two, which is composed of a contaminant.

and a lid or cover consisting of two parts-. 0 and d. The lid sections 0 and d may be? so arranged, that each of them can be 'separately opened or removed. The part cmay,

however, be coupled by means of a hinge e topart d, as shown in Fig. 2,.and part d coupled by means Ora hinge f to the container b. The whole casing 12, c is of course, insulated with a material of low heat conductivityor madeentirely ofsuchama L terial In, the-container b are arranged removable fre'ezin cells g inany Suitable manner, shape. the drawing they allow ofproducing ice in form of slabs in also be arranged in the container 6 any other, mannerallowing of their. easyj 1fe-' moval.

In place of order that blocks of ice ma be obtained by combining several such sla s. The cells 9 rest, with beaded rim on ledges h rovilded in the container' According to t e shape 1 of the freezing; calls these may, however,

the cells 9, a large box, adapt} I edto carry provisions andbeverages, maybe a placed in the container b,-so ,that'it rests on the cross ledges h by means of a flanged rim, hooks or the like. Such a box wou d erably be made open at the top or with a removable lid, like lid 0, sogas to allow of an access to its interior by liftingthe ilid.

The container b isfilled to a suitable height with a cold transmittin medium 71,-

a not easily freezing brine or instance.

This liquid or brine surroufidsthe cells 9,

condenser-evaporator a: is, however, only partly immerged into the solution, so that it will carry up by adhesion during its rotation, a .part of the said liquid from the warmest portions of the latter and thereby cooling the raised liquid in the manner hereinbefore described. Thiscooling effect may be still further increased by providing the i 'infthe container as far as-necessary. The

Y evaporator aduring the heatingiperiod ofcondenser-evaporator withbuokets 70, which are arranged between the lenticular elements of the condenser-evaporator a and may project somewhat beyond its periphery.

If the machine is to be used as an iceor refrigerating safe, one of the sidewalls of the container I has an opening, which is made closable by a door and a tight fitting box, projecting into the container 6 is inserted in this opening, so that the articles to be cooled may be introduced through the opening in the wall of the container b into the inserted box.

In practice the invention will be carried out in the following manner: The condenserthe machine is taken away from the container b and placed on a special stand, while the heating of the generator-absorber and the cooling of the condenser-evaporator a is accompllshed by means of a special cooling water. If, however, 'it should be desired to leave the condenser-evaporator inthe container 5 even during the heating period, the

container must first be filled with cold water, "which water, at the end of the heating period, must be drained 011, and the container 6 will thereupon be filled with the cold transmitting medium. A continuous working of the process is not possible, the device operating intermittently.

I claim: v

1.In an ice making'machine, the combination with a rotating generator-absorber of a rotating condenser-evaporator in communication therewith, said condenser-evaporator comprising a plurality of intercommunicating lenticular' elements arranged side i by side, a plurality of buckets on the outside ed to permanently confine a refrigerant, said condenser-evaporator comprising a plurality;

of intercommunicating lenticularelements on the outside of said. condenser-evaporator between the lenticular elements; a container arranged side by side, a plurality of buckets for a cold transmitting medium, and a lid completely closing the container, said condenser evaporator being inclosed in said container and partly immersed in thecoldtrans mitting medium, and'a receptacle for the material to be cooled within the container immersed in said cold transmitting-medium,

said refrigerant being evaporated by means of the external flushing of thecondenserevaporator by the said medium when carried around by said buckets, whereby a cold current is generated in the cold transmitting medium from said condenser-evaporator to said receptacle for cooling said receptacle. In testimony whereof I aflix my signature in presence of two witnesses.

' WILHELM GRAAFF. Witnesses:

' .Lours E. 'THOMPBON,

IIENRY HASPER. 

